the receptor-binding domain of human B7-2

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.252 

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This is version 1.2 of the entry. See complete history


Crystal Structure of the Receptor-Binding Domain of Human B7-2: Insights into Organization and Signaling

Zhang, X.Schwartz, J.D.Almo, S.C.Nathenson, S.G.

(2003) Proc Natl Acad Sci U S A 100: 2586-2591

  • DOI: https://doi.org/10.1073/pnas.252771499
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    B7-1 and B7-2 are homologous costimulatory ligands expressed on the surfaces of antigen-presenting cells. Their interactions with CD28/CTLA-4 receptors expressed on T cell surfaces are crucial for the proper regulation of T cell activity. B7-1 and B7-2 display distinct roles in immune regulation, although they are usually considered to have redundant functions. Here, we report the crystal structure of the receptor-binding (Ig V-type) domain of human B7-2 at 2.7-A resolution. Structures of unliganded and liganded B7-1 and B7-2 suggest a physical-chemical basis for the observed functional similarities and differences between these two costimulatory ligands. Of particular note, whereas the majority of the residues mediating B7-1 dimerization are hydrophobic, the B7-2 dimer observed in the B7-2/CTLA-4 complex displays a very hydrophilic dimer interface. These differences provide a mechanism for preventing the formation of B7-1/B7-2 heterodimers. The divergence at the putative dimer interface is also consistent with the lower tendency of B7-2 to dimerize, as shown by the monomeric state of unliganded B7-2 both in solution and crystalline form, and may result in detailed differences in signaling mechanisms associated with B7-1 and B7-2.

  • Organizational Affiliation

    Department of Cell Biology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
T lymphocyte activation antigen CD86
A, B
110Homo sapiensMutation(s): 0 
Gene Names: B7-2
UniProt & NIH Common Fund Data Resources
Find proteins for P42081 (Homo sapiens)
Explore P42081 
Go to UniProtKB:  P42081
PHAROS:  P42081
GTEx:  ENSG00000114013 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42081
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.252 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.69α = 90
b = 63.01β = 90
c = 58.61γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-03-11
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance